chore(KB): update icon declaration

Author: Tsvetomir-Hr

knowledge-base/chiplist-add-chip-tooltips.md

@@ -72,7 +72,7 @@ To add tooltips to chips in the ChipList, use the `ItemTemplate` to customize ch
     public class ChipModel
     {
         public string Text { get; set; }
-        public object? Icon { get; set; }
+        public ISvgIcon? Icon { get; set; }
         public string Description { get; set; }
     }
 }